diff --git a/fixline1 b/fixline1
index 81e8a02..26f6553 100755
--- a/fixline1
+++ b/fixline1
@@ -22,6 +22,8 @@ if {[regexp {^#!(?:.*/)*([^ ]+)} [gets stdin] {} interp]} {
 	    set with_tk {package require Tk}
 	}
 	expect {}
+	tclsh { exit 0 }
+	sh { exit 0 }
 	default {
 	    error "FIXME: $interp"
 	}